totpUtil.js

// Copyright 2024 The Casdoor Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import totp from "totp-generator";

export function calculateCountdown(period = 30) {
  const now = Math.round(new Date().getTime() / 1000.0);
  return period - (now % period);
}

export function validateSecret(secret) {
  const base32Regex = /^[A-Z2-7]+=*$/i;
  if (!secret || secret.length % 8 !== 0) {
    return false;
  }
  return base32Regex.test(secret);
}

export function generateToken(secret) {
  if (secret !== null && secret !== undefined && secret !== "") {
    try {
      const token = totp(secret);
      const tokenWithSpace = token.slice(0, 3) + " " + token.slice(3);
      return tokenWithSpace;
    } catch (error) {
      return "Secret Invalid";
    }
  } else {
    return "Secret Empty";
  }
}